Qt: How to delete the white lines?

Question

I want to delete the white lines of the tabwidget on the right and bottom side, but I don't know how.

I've tried to set the border-right-color and border-bottom-color, but it doesn't work.

Answer 1

Try to make it via css

Like that in .qrc in .css:

QTabWidget
{ 
   border: 3px solid grey; 
}

or via QWidget::setStyleSheet(const QString &styleSheet)